He is in Canada.. not sure what their laws areRun your Idea by the two major animal rights organizations and see what they think about it. My feelings is that they would think that feeding day old mice to chickens is worse than feeding day old humans to crocodiles.
Remember this. There is already a requirement that you purchase a Federal permit to get into the rodent growing business with mandatory testing and inspections to make sure that you are not abusing your tame rodents or poorly carrying for them.